JP2009201319A5 - - Google Patents

Claims (11)

A vibrator whose vibration is excited by an electro-mechanical energy conversion element;
A moving body which is moved relative to said vibrating member by Kifu motion before being pressed by the contact pressure due to vibrations excited in the vibrator,
A friction member provided between the vibrating body and the moving body and having a contact surface that abuts against the surface of the vibrating body and the surface of the moving body;
The friction member has a contact surface of the friction member that is not fixed to any of the contact surfaces of the vibrating body and the moving body, and behaves integrally with the contact surface of either the vibrating body or the moving body. The vibration wave drive device characterized by showing.   The friction member includes an attachment portion that is fixed to a place other than the contact surface of the vibrating body, a plurality of flexible arm portions that extend radially from the attachment portion to the outer peripheral side, and the plurality of arms. The vibration wave driving device according to claim 1, wherein the vibration wave driving device has a ring shape having a plurality of friction portions each extending from the portion.   The said friction member is a ring shape which has the attaching part fixed to locations other than the contact surface of the said vibrating body, and the friction part provided along the outer peripheral side of the said attaching part, It is characterized by the above-mentioned. The vibration wave drive device according to 1. Hardness of the contact surface facing the friction that put the member before Symbol vibrator or the moving body, wherein, wherein the lower than the hardness of the contact surface facing the friction member in the vibrating member or the movable body The vibration wave driving device according to Item 1. The material of the contact surface you opposed to each of the vibrating body and the moving body in the friction member, the feature and Turkey different from the material of the contact surface opposite to each of the friction member in the vibrating body and the moving body The vibration wave driving device according to claim 1. Wherein the the contact surface you face the movable body and the contact surface facing the vibration member, the vibration wave driving apparatus according to claim 1, wherein the surface roughness is different in the friction member. 2. The vibration wave according to claim 1, wherein a minute protrusion is provided on a contact surface of the friction member facing the moving body, and the contact surface of the moving body is formed of a material that can be pierced by the minute protrusion. Drive device.   The vibration wave driving device according to claim 1, wherein anisotropic processing marks are provided on contact surfaces of both the friction member and the movable body.   A difference is provided between the size of the sliding diameter on the contact surface of both the friction member and the movable body and the size of the sliding diameter on the contact surface of both the friction member and the vibrating body. The vibration wave driving device according to claim 1.   The vibration wave driving device according to claim 2, wherein the friction member is pressed against the vibrating body by a contact pressing force by a spring member and a pressing force by the arm portion.   2. The vibration wave driving device according to claim 1, wherein either the vibrating body or the friction member is magnetized.